The fact that you can use combustion to generate electricity, means they are interchangeable. The other comment is probably more on point about conversion effeciency.

> that you can use combustion to generate electricity, means they are interchangeable

This is an accounting issue, not a question of thermodynamics. Electricity typically refers to grid electric. We don’t count non plug-in hybrid electrical output as “electricity.” That’s how energy use can be stable while electrification increases.